Gif Won't Load

I'm having some trouble with my gif files. At first I was having trouble downloading macromedia flash player but once I got that working, all my flash and gifs and what not were working fine until out of nowhere they wouldn't load. Also when I right click on the gif, alot of the info says "not available". When I try to save it as a gif it also won't let me and instead saves as a bitmap file. Has anyone else had this problem before? I'd really appreciate the help. Thank you

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